This is PL2303 TA Download Cable USB to TTL RS232 Module USB to Serial.

The cable is the easiest way ever to connect to your microcontroller/Raspberry Pi/WiFi router serial console port. Inside the big USB plug is a USB to Serial conversion chip and at the end of the 1M cable are four wire – red power, black ground, white RX into the USB port, and green TX out of the USB port.

The power pin provides the 5V @ 500mA direct from the USB port and the RX/TX pins are 3.3V levels for interfacing with the most common 3.3V logic level chipsets.

Because of the separated pin plugs, this cable is ideal for powering and connecting up to the debug/login console on the Raspberry Pi or BeagleBone Black.

Also handy for hacking WiFi routers to install alternate OS’s, or nearly any other 3.3V logic serial port. This is easier to use than an FTDI cable in many cases because the wires are separated.

Pin Connection

Red: +5 V 
Black: GND 
White: RXD 
Green: TXD 

Applications:

1. Single-chip upgrade solution for Legacy RS232 devices to USB interface
2. USB to RS232 converters/cables/dongles
3. Healthcare/Medical USB Interface Data Transfer Cable
4. Personal Infotainment/Media Player Docking USB Interface
5. Cellular/PDA USB Interface Data Transfer Cable
6. Serial-over-IP Wireless Solution
7. USB Barcode/Smart Card Readers
8. GPS/Navigation USB Interface
9. Point-of-Sale (POS) Terminals/Printers
10. PC Docking Station/Port Replicators
11. Industrial/Instrumentation/Automation Control USB Interface

Features :

1. Built-in TTL COM PC-PL2303HX Chip.
2. Standard USB type and TTL 4 pin connector
3. Simple and Easy way to give USB support to your designs
4. Available for Linux, Mac, WinCE, and Windows (XP, 7), Win 8

Package Includes :

1 x PL2303 TA Download Cable USB to TTL RS232 Module.